阅读下面对话。从方框内6个选项中选择恰当的5个句子完成此对话。
John: Hi, Karl. You were not here, in your class yesterday afternoon. What was wrong?
Karl:________
John: Sorry to hear that   
Karl: Much better. The fever is gone. But I still cough and I feel weak.
John:    
Karl: Yes, I have. I went to the doctor’s yesterday afternoon. The doctor gave me some medicine and asked me to stay in bed for a few days.
John:   
Karl: Because I’m afraid I’ll miss more lessons and I’ll be left behind.
John: Don’t worry. Take care of yourself    
Karl: Thank you.